Modelling Short-Term Interest Rate Spreads in the Euro Money Market

41 Pages Posted: 23 Dec 2008

See all articles by Nuno Cassola

Nuno Cassola

University of Milan Bicocca - CefES; University of Lisbon - CEMAPRE

Claudio Morana

Università di Milano Bicocca; Università degli Studi di Milano-Bicocca - Department of Economics, Management and Statistics (DEMS); Università degli Studi di Milano-Bicocca - Center for European Studies (CefES); Center for Economic Research on Pensions and Welfare Policies (CeRP); University of Bologna - Rimini Center for Economic Analysis (RCEA)

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Date Written: December 3, 2008

Abstract

In the framework of a new money market econometric model, we assess the degree of precision achieved by the European Central Bank ECB) in meeting its operational target for the short-term interest rate and the impact of the U.S. sub-prime credit crisis on the euro money market during the second half of 2007. This is done in two steps. Firstly, the long-term behaviour of interest rates with one-week maturity is investigated by testing for co-breaking and for homogeneity of spreads against the minimum bid rate (MBR, the key policy rate). These tests capture the idea that successful steering of very short-term interest rates is inconsistent with the existence of more than one common trend driving the one-week interest rates and/or with nonstationarity of the spreads among interest rates of the same maturity (or measured against the MBR). Secondly, the impact of several shocks to the spreads (e.g. interest rate expectations, volumes of open market operations, interest rate volatility, policy interventions, and credit risk) is assessed by jointly modelling their behaviour. We show that, after August 2007, euro area commercial banks started paying a premium to participate in the ECB liquidity auctions. This puzzling phenomenon can be understood by the interplay between, on the one hand, adverse selection in the interbank market and, on the other hand, the broad range of collateral accepted by the ECB. We also show that after August 2007, the ECB steered the "risk-free" rate close to the policy rate, but has not fully off-set the impact of the credit events on other money market rates.

Keywords: money market interest rates, euro area, sub-prime credit crisis, credit risk, liquidity risk, long memory, structural change, fractional co-integration, co-breaking, fractionally integrated factor vector autoregressive model

JEL Classification: C32, E43, E50, E58, G15

Suggested Citation

Cassola, Nuno and Morana, Claudio, Modelling Short-Term Interest Rate Spreads in the Euro Money Market (December 3, 2008). ECB Working Paper No. 982, Available at SSRN: https://ssrn.com/abstract=1310620

Nuno Cassola (Contact Author)

University of Milan Bicocca - CefES ( email )

Milan
Italy

University of Lisbon - CEMAPRE ( email )

Lisbon
Portugal

Claudio Morana

Università di Milano Bicocca ( email )

Dip Economia Metodi Quantitativi Strategie Impresa
Piazza dell'Ateneno Nuovo 1
Milano, 20126
Italy
+39 0264483091 (Phone)

Università degli Studi di Milano-Bicocca - Department of Economics, Management and Statistics (DEMS) ( email )

Piazza dell'Ateneo Nuovo, 1
Milan, 20126
Italy

Università degli Studi di Milano-Bicocca - Center for European Studies (CefES) ( email )

U6 Building
Viale Piero e Alberto Pirelli, 22
Milano, 20126
Italy

Center for Economic Research on Pensions and Welfare Policies (CeRP) ( email )

Moncalieri, Turin
Italy

University of Bologna - Rimini Center for Economic Analysis (RCEA) ( email )

Via Patara, 3
Rimini (RN), RN 47900
Italy

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